No trouble at all. Figs are easy to train. Are you going to let them bush out or keep them flat against that wall?

Bush. I like the bare structure in winter.

Plus more branches mean more fruit!

The more fruit the better! I have a freezer and I'm not afraid to use it. :)

Soon you will be like the rest of us in here and other fig forums. 2 varieties will just not be enough, and you will figure out a way to get 4 varieties on that same wall! So they co-mingle... Not a bad thing! I don't know what planting zone you are in. You should put that next to your name so others can recommend good varieties for you. Desert King is delicious, but only puts out a Breba crop. Others give you 2 crops per year. I just had a thought. Is the south wall, your house, and are you on a slab? Fig roots can do serious damage to slabs, so you might either want them in large pots or quite a distance from that south wall. If you have a basement, you should be fine. You have a Green with red center fig AKA Desert King, and Negrone, a Dark fig with a red interior. You need a honey golden fig like LSU Gold or my fav, Mary Lane Seedless... See?

One more thing, Verte is much like Desert King. Green with raspberry jammy flesh, but gives you two crops per year. Bourjasotte Gris is another prolific green/red variety.

Can you use epson salts as a fertilizer for a small 1 and a half foot seedling?